In a world facing climate change, rising energy demands, and urgent calls for sustainability, the fields of Renewable Energy, Environmental Engineering, and Sustainability have never been more important.
Whether you’re a student preparing for your bachelor’s degree, a graduate exploring master’s options, or a parent helping your child choose a future-proof career, free online courses are a fantastic way to explore these fields before committing to a full program.
These courses are offered by world-renowned universities and institutions and they’re completely free to access (some even offer optional paid certificates).
Let’s explore these free courses that can help you start or advance your journey toward a greener future.
1. Solar Energy International – RE100: Introduction to Renewable Energy
Free introduction to solar, wind, micro-hydro and energy basics.
2. Alison – Introduction to Environmental Engineering
Free online course for beginners in environmental engineering.
3. Alison – Sustainable and Renewable Energy
Free course covering renewable energy sources and sustainable development.
4. MIT OpenCourseWare –Energy Collection
Free to audit any of the energy/engineering courses in the collection.
5. New York State Energy Research & Development Authority (NYSERDA) – Directory of Free Online Clean Energy Training
A curated directory of free clean-energy trainings across topics.
6. Fundamentals of Environmental Engineering — Alison
Learn about air pollution control, solid waste management, and sustainable water and wastewater treatment systems.
7. Renewable Energy Management — Alison
Understand how renewable energy projects are planned and managed, including topics like wind, hydro, and solar power.
8. Sustainable Energy Systems — Alison
Covers renewable energy technologies, energy resource conversion, and their environmental and economic impacts.
9. Free Online Environmental Sustainability Training Course with Certificate — Green Chemistry for Sustainability / KnowESG
Learn practical sustainability skills including carbon reduction, biodiversity, and responsible production — fully free and includes an optional certificate.
10. Fundamentals of Sustainable Energy — Alison
A short course introducing the core concepts of sustainable energy and how to transition toward greener global systems.
Quick Note:
Free courses like these aren’t a substitute for a full degree in Environmental Engineering, Renewable Energy, or Sustainability, but they give you a powerful head start.
They showcase your curiosity, strengthen your scientific and technical foundation, and make you stand out when applying for scholarships, internships, or master’s programs in green technology, energy systems, or environmental studies abroad.
Use these courses to bridge the gap between where you are today and where you dream to study or work tomorrow — whether that’s designing solar cities, managing climate projects, or innovating sustainable solutions.
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